Combined abrasive and carrier



Nov. 20, 1928.

M. C. HUTTO COMBINED ABRASIVE AND CARRIER Filed Dec. ll, 1926 l 'I fl"NVENToR. M'mfpf/v C- #afro m CML ATTORNEY.

Patented Nov. zo, 192s. 1,692,661

' UNITED STAT-ES PATENT OFFICE MABSDEN C. HUTTO, F DETROIT, MICHIGAN.

COMBINED ABRASIVE AND CARRIER.

Application led December 11, 1926 Serial No. 154,28.

This invention relates to abrasive holders as shown, shall be of acertain length rela- 55 for cylinder grinders and is a continuation tiveto the grinding face of the stone. Thus in part of my application SerialNo. 661,- the method of manufacture of the abrasive 883, filed Septemberl0, 1923. and its holder as hereinafter described seeks Moreparticularly the invention is a comprimarily to insure accuracy in themountbined abrasive and holder, the fundamental ing of the stone so thatthe face which lies 0 characteristics of which are described in thelongitudinally of the tool shall normally be said previous applicationand an improved strictly parallel with the axis thereof. form of whichis disclosed herein. Stones used in cylinder grinders or lap- The objectof the invention is to provide ping devices are usually made ofcompacted a combined holder and abrasive in which granular material suchas carborundum or 65 the abrasive member, usually Vin the form of likeabrasive and subsequently fired. Such a natural or artificial stone issupported in stones usually vary in thickness throughout a channeledmember having associated theretheir length and therefore requiredressing with members engaged by the adjusting after the stone has beenmounted in its means of the tool of which it forms a part holder. i sothat the grinding face of the abrasive is A feature of this invention isin promounted in the tool in a precise relationviding a holder and amethod of mounting ship with the adjusting device. In the tool the stonetherein which insures parallelism with which the combined abrasive andholder 0f the grinding face of the stone with the is used as shown inthe said original apaxis of the tool in which it is to be used plicationSerial No, 661,883 and as is shown irrespective of variations inthickness of the Vherein several abrasive members are mounted stone.Thus, the surface of the stone is norin a head intended to bereciproeated and `mally exactly parallel with the axis of ro- 25 rotatedin the cylindrical aperture to be ttiOn 0f the grinding dome.

ground, and a. feature of this invention re- An object of this inventiontherefore is to Bil lates more particularly t0 the holder of provide aholder and a stone in which the channel like form in which the stone isSeolder and the stone are held in the desired cured by a self-hardeningmaterialthat is, final relationship and a self-hardening maflowed toplace in a more or less liquid ferm, terial flowed between the memberswhereby This material may be solder or lead 0r even a they automaticallybecome fixed in the necese5 varnish or shellac and, while the stone andsary relationship and the finishing ofthestone `holder are held in therelative final posil1bSeq11ent t0 mounting is dispensed With tions, thematerial for securing the stone lnsmuch as major inaccuracies arecompenin AAplace is supplied thereto. sated for by the self-hardeningmaterial.

further feature of the invention is in These objects and the severalnovel feauo the provision of a holder of sheet metal tllleS 0f theiIlVBnfiOn are hereinafter mre ,form with which the portions thereoffully described and claimed, and the-preadapted for engagement, with theadjustferred form of an abrasive and.its carrier 40 ing device of thetool are riveted in place 91' hOlder mbdyillg my iIlVeIliSiOn iS ShQWIland the stone mounted therein by a solder 1n the accompanying drawingsin which- 05 or suitable material in which the stone is Fig- 1 iSlOllgitudinal Section 0f a tOOl floatedlvor owed in its finalrelationship ShOWlng my im roved abrasive and its with the holder andthus fixed in predeterhOlder mounted t cren. 45 mined position as thematerial hardens. Fig. 2 is a perspective view of the As is hereinaftermore fully described I finished holder. preferably utilize a pair ofpins each .ad- Fig. 3 is a cross section taken on line 3--3 jacent anend` of the holder which when in 0f Fig. 2. the tool fit againstopposing coned members Fig 4 is a cross section of the holder and Mithat are adjustable toward or from each other the stone indicating themethod of securing and 'iny order that all the holders and the the Stonein place therein. los

faces of all the abrasives shall lie in the Figs. 5 and 6 are verticallongitudinal same circle, 4it is essential that these cone sections, ona reduced scale, taken on the contacting portions, which may be the pinscorrespondingly numbered lines 1n Fig. 2,

the self hardening material being shown between the supporting base andthe stone corresponding to Fig. 3.

In my previous application Serial No. 661,883 above mentioned I haveshown a similar holder in which the stone is held in place by means oflead. In the invention there disclosed and herein further described theholder consists of a sup orting base hav'- in preferably the form of) ashell or channe ed member 1 which as here shown is referably made ofsheet metal formed in a die and may be provided with an extending lip orlug 2 at opposite ends thereof. This shell or channeled member 1preferably has a shape in cross section as shown more particularly inFig. 3 and adjacent each end thereof is provided parallel pins 3 and 4of like form projecting transversely from the bottom 1 of the holder andat right angles thereto. These pins extend through apertures providedtherefor in the body 5 of the tool kto en age the res ective conemembers 6 and 7, the ends of tlie pins being tapered as at 8 to provideline contact with the respective cone member. As described in the saidprevious ap lication these cones may be adjusted as to istance apartthrough the central adjusting screw 9 which is provided with a head 10slotted for use of a screw driver. By turning the adjusting screw todraw the cones together the faces of the abrasive members are moved to agreater radial distance from the axis of the tool and bythe reverseturning of the screw the 'cones are retracted which is preferablyaccomplished through use of the spring members 9 and 10 which engage thelips 2 of each of the holders tending to contract the same.

The two cones are yieldingly held apart by a spring 9 surrounding thescrew 9 and bearing against the inner ends of the cones, as shown 1nFig. 1.

Subsetent to the formation of the channel mem r by means of a die asstated, the shouldered pins 3 and 4 have the reduced portions 11 thereofinserted through apertures provided ad'acent each end of the shell ormember 1 an the ends thereof peened over to fixedly secure the pins inplace. `[.Ipon completion of this step the holder consists of theassembled channeled member and pins which are maintained in fixedrelation with the shell but it is to be understood that the channelmember may be provided with means for contacting the cones other thanwhat is here termed pins Such different form of holder is shown in mvending apllcation Serial No. 44,644 filed Jliily 20, 1925 m which itwill be observed that the principal feature of this invention may beutilized in either form 'of cone contacting member.

This shell or channeled member 1 further has an aperture in the bottom 1thereof midway between the cone contacting devices indicated at 11 inFig. 4 and, to secure the stone 12 in place in the holder, I place theholder in a form or mold 13 with the longitudinal edges 15 of its sidefianges 1 engaging gage faces 15 thereof as indicated diagrammaticallyin Figs. 4 and 6. In the form or mold has reviously been positioned thestone 12 which) also lies with its longitudinal outer or working face 12on a gage face 14 of the form or mold exactly parallel with the gagefaces 15 of the form. Due to the two side edges 15 of the channel memberbeing finished to a definite length from the outer side of the bottom l,the face 12 of the stone 12 is arallel with said bottom. In the positiono the arts shown in Fig. 4 the stone and the hollder are therefore in arelationship in which they are to be fixed and to fix these partstogether I introduce a solder or other self-hardening material 13through the aperture 11. The inaccuracies in stone thickness shown at12" in Fi 5 are thus disposed within the holder and t e fece 12 of thestone lies parallel with the side edges 15 and bottom of the holder atexactly a r1 ht angle to the axes of the pins 3 and 4.

'Ie assembled abrasive and holder is then removed from the form and thepins 3 and 4, or the cone contacting member of whatever form, arefinished off for contact with the adjusting cones at an exact lengthmeasuring from the face of the stone. f pins be utilized for the coneContactin members, as is herein shown, and due to t e edges 15 of thechanneled member being finished olf parallel with the bottom of the saidmember against which the shoulder of the pins engages, the axes of thepins are therefore, by this method, exactl at a right angle to the faceof the stone. rllhis accuracy in relationshi of the stone and holder isnecessa in or er to secure precision in operation o the tool and tofunction with the adjusting means so that the faces of all the stonescut the same circle.

The object of the invention therefore is secured by this method andcharacter of device-that is, by this form of holder and method of makingthereof I secure precision and secure a grinding tool that is accuratein the finishing of a piece of work and accurate throughout all of itspossible adjustments.

I am aware of other devices of this general character in which abrasivemembers are utilized many of which have stones and holders that arespring projected to working contact with the wall of the aperture beingground. This tool operates differently in that the holders arepositively held in the adjusted position, and while the cone members 6and 7 may traverse or move as a unit longitudinally of the tool body andthusl permit the abrasive at one end to move toward the axis of the tooland at the other end outwardly therefrom as is set forth in the abovementioned pending application, et as the tool in its operation isrelieved rom pressure through the rinding away of the surface operatedon te adjusting unit including the said cones takes the neutral positionshown in Fig. 1 in which the faces of the stones lie exactly arallelwith the axis of the tool. This position being assumed at the completionof the grinding operation as the tool grinds free, the aperture beingground through reciprocation and rotation of the tool therein vis of auniform diameter throughout its length and with a straight wall. Thisaccurac in o eration is secured b the character o the older hereindisclbsed and the absorption of possible inaccuracies b means of a fluidmedium 13 flowed or oa-ted between the holder and the stone.

The combined abrasive and holder therefore provide a unit toreplace wornunits of like character and has been devised to avoid inaccuraciesresultin from the user of the tool attem ting to rep ace a worn stone inholders as eretofore utilized in this art. To secure precision inoperation of the tool` the unit should be replaced by a new unit of thesame accuracy and precision as the worn unit.

By ga ing the longitudinal face of the stone an the longitudinal edgesof the base or holder in parallelism on the mold the `stone and holdermay be secured together by self hardening material in a technicallycorrect position relative to each other and the guide pins and theco-operatin parts on the body regardless of any irreguarities on theback of the stone, as shown at 12h 5 and 6.

It will be noted that this combined abrasive and holder permits of readyreplacement of similar articles used in a cylinder grinder in that thestone supporting base provides means for determining and maintaining adesired relation of the abrading surface carried thereby to the axis ofrevolution and traverse of the cylinder grinder, and that the grindingstone orv abrasive is secured to the base by a substantially rigidiadherent material which permanently positions the stone with referenceto the base and with its abrading surface in said determined position,so that on assembly in the tool the working face of the stone occupies atechnically correct yworking position.

in Figs.

Having thus fully described my invention,

its utility and mode of operation, what I claim and desire to secure byLetters Patent of the United States isf 1. As a new article ofmanufacture, a' combined abrasive and holder therefor adapted forreplacement of similar articles used in a cylinder grinder such asdescribed comprising a channeled member and a grinding stone or abrasivesecured in the channel by means of a solder and with the face of thestone parallel with the back of the channel member, guide pins securedto the back of the member each having its axis at a right angle to thesaid back and finished to an equal length from the face of the stone.

2, A combined abrasive and holder therefor adapted for replacement ofsimilar articles used in a cylinder grinder such as described comprisinga channeled stone supporting base providing means for determining andmaintaining a desired relation of an abrading surface carried thereby tothe axis of revolution and traverse of the c linder grinder, and agrindin stone or a rasive secured in the channel o? said base by meansof a substantially rigid adherent material permanently positioning thestone in the said channeled member with its abrading surface in saiddetermined relation whereby on assembly in the tool the working face ofthe stone occupies a technically correct working position.

3. A combined abrasive and holder for cylinder inders comprising astamped sheet metal older of channeled form having inteal lugs at itsopposite ends for a retaining element, a pair of guide pins extendingfrom the back thereof, and an abrasive or stone secured in the holder bya hardened Huid adherent material permanently positioning the workingface of the abrasive or stone at a right an le to the lon itudinalAaires of the pins, sai pins having t ieir free ends finished in likeform to equal length from the working face of the stone.

4. A combined abrasive and holder therefor adapted for replacement ofsimilar articles used in a cylinder grinder such as described,comprising a stone supporting base providing means for determining andmaintaining-a desired relation of an abrading surface carried thereby tothe axis of revolution and traverse of the cylinder grinder; andy ainding stone or abrasive secured thereto y means of a substantiallyrigid adherent material permanently positioning the stone with referenceto the base with its abrading surface-in said determined relation,

whereby on assembly in the tool the working face of the stone occupies atechnically correct working position.

5. A combined abrasive and holder therefor adapted for replacement ofsimilar articles used in a cylinder grinder such as described, com risina stone supporting base and paralle i e pins pro3ecting transverselyfrom t e outer side of the base, said base and pins providing means fordetermining and maintaining a desired relation of an abradinn' surfacecarried thereb to the axi of revoution and traverse of 5the c lindeisrelation, whereb grinders; and a. grinding stone or a rasive secured tome base by means of a substantlally rlgld adherent material whichpernically correct working position.

cation.

manently positions the stone on the base and with its abrading surfacein said determined MARSDEN C, HUTTO.

- y .DISCLAIMER 1,692'661.-Maradn 0. Hutto, Detroit,l Mich. ColumnABBAsIvn AND Cminmn.

, tent assignee, Hutio Engineeringompany, Inc. y Hereby enters thisdisclaimer to lall of the claims of said specification, which discleimer1s in the'iollowing words, to wit: hereby disclaims as to each of thesaid claims any and abrasive and holder assemblies ezcept wherein thestone is permanently positioned bythe self-hardening material or solderin the holder with the workirlx face or ebradmg' surface in the positionreferred to in ech claim by a form 0T m0 substantial amounteo as to'form e'spacer between ell the adiacente stone and the holder. I wwwGam'npl 8,1980-1 aces of the on assembly in the tool 'he working face othe stone occupies a tecn- In testimony whereof I sign this specifidatedNovember-20, 1928, Disclaimer filed Merch 26, 1930, by the;

casting operation 'and the sell-hardening mterial'or solder is`elrlnlloyed in a.

abradinn' surface carried thereb to the axi of revoution and traverse of5the c lindeis relation, whereb grinders; and a. grinding stone or arasive secured to me base by means of a substantlally rlgld adherentmaterial which pernically correct working position.

cation.

manently positions the stone on the base and with its abrading surfacein said determined MARSDEN C, HUTTO.

- y .DISCLAIMER 1,692'661.-Maradn 0. Hutto, Detroit,l Mich. ColumnABBAsIvn AND Cminmn.

, tent assignee, Hutio Engineeringompany, Inc. y Hereby enters thisdisclaimer to lall of the claims of said specification, which discleimer1s in the'iollowing words, to wit: hereby disclaims as to each of thesaid claims any and abrasive and holder assemblies ezcept wherein thestone is permanently positioned bythe self-hardening material or solderin the holder with the workirlx face or ebradmg' surface in the positionreferred to in ech claim by a form 0T m0 substantial amounteo as to'form e'spacer between ell the adiacente stone and the holder. I wwwGam'npl 8,1980-1 aces of the on assembly in the tool 'he working face othe stone occupies a tecn- In testimony whereof I sign this specifidatedNovember-20, 1928, Disclaimer filed Merch 26, 1930, by the;

casting operation 'and the sell-hardening mterial'or solder is`elrlnlloyed in a.

